Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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A/T Idle Control Solenoid Valve


When the air conditioner is turned on, the A/C idle control solenoid valve opens. This causes the A/C idle control diaphragm to open the throttle valve, which in turn raises the idle speed. This valve also opens when coolant temperature is low to ensure stable idling regardless of position of A/C switch.